boomgoesthegmat wrote:If 1.5/(0.2 + x) = 5, then x =
A) -3.7
B) 0.1
C) 0.3
D) 0.5
E) 2.8
To clear the decimals, multiply the top and the bottom of the red fraction by 10:
15/
(2 + 10x) = 5.
Since 15/3 = 5, the expression in blue must be equal to 3:
2 + 10x = 3
10x = 1
x = 1/10.
The correct answer is
B.
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